#include "tsmartpointer.h"
#include "tthread.h"

//-------------------------------------------------------------------

namespace
{

//-------------------------------------------------------------------

typedef TAtomicVar *TAtomicVarPtr;

const int maxClassCode = 100;
TAtomicVarPtr instanceCounts[maxClassCode + 1];

//-------------------------------------------------------------------

inline TAtomicVar &getInstanceCounter(long classCode)
{
	assert(0 <= classCode && classCode <= maxClassCode);
	TAtomicVarPtr &instanceCountPtr = instanceCounts[classCode];
	if (instanceCountPtr == 0) {
		static TThread::Mutex mutex;
		TThread::ScopedLock g(mutex);
		if (instanceCountPtr == 0)
			instanceCountPtr = new TAtomicVar();
	}
	assert(instanceCountPtr);
	return *instanceCountPtr;
}

//-------------------------------------------------------------------

} // namespace

//-------------------------------------------------------------------

const long TSmartObject::m_unknownClassCode = 0;

void TSmartObject::incrementInstanceCount()
{
#ifdef INSTANCE_COUNT_ENABLED
	TAtomicVar &instanceCount = getInstanceCounter(m_classCodeRef);
	++instanceCount;
#else
	assert(0);
#endif
}

//-------------------------------------------------------------------

void TSmartObject::decrementInstanceCount()
{
#ifdef INSTANCE_COUNT_ENABLED
	TAtomicVar &instanceCount = getInstanceCounter(m_classCodeRef);
	assert(instanceCount > 0);
	--instanceCount;
#else
	assert(0);
#endif
}

//-------------------------------------------------------------------

long TSmartObject::getInstanceCount(ClassCode code)
{
#ifdef INSTANCE_COUNT_ENABLED
	TAtomicVar &instanceCount = getInstanceCounter(code);
	return instanceCount;
#else
	assert(0);
	return 0;
#endif
}

//-------------------------------------------------------------------